drivers/net/wireless/mwifiex/init.c

   1 /*
   2  * Marvell Wireless LAN device driver: HW/FW Initialization
   3  *
   4  * Copyright (C) 2011, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "decl.h"
  21 #include "ioctl.h"
  22 #include "util.h"
  23 #include "fw.h"
  24 #include "main.h"
  25 #include "wmm.h"
  26 #include "11n.h"
  27
  28 /*
  29  * This function adds a BSS priority table to the table list.
  30  *
  31  * The function allocates a new BSS priority table node and adds it to
  32  * the end of BSS priority table list, kept in driver memory.
  33  */
  34 static int mwifiex_add_bss_prio_tbl(struct mwifiex_private *priv)
  35 {
  36         struct mwifiex_adapter *adapter = priv->adapter;
  37         struct mwifiex_bss_prio_node *bss_prio;
  38         struct mwifiex_bss_prio_tbl *tbl = adapter->bss_prio_tbl;
  39         unsigned long flags;
  40
  41         bss_prio = kzalloc(sizeof(struct mwifiex_bss_prio_node), GFP_KERNEL);
  42         if (!bss_prio)
  43                 return -ENOMEM;
  44
  45         bss_prio->priv = priv;
  46         INIT_LIST_HEAD(&bss_prio->list);
  47
  48         spin_lock_irqsave(&tbl[priv->bss_priority].bss_prio_lock, flags);
  49         list_add_tail(&bss_prio->list, &tbl[priv->bss_priority].bss_prio_head);
  50         spin_unlock_irqrestore(&tbl[priv->bss_priority].bss_prio_lock, flags);
  51
  52         return 0;
  53 }
  54
  55 static void scan_delay_timer_fn(unsigned long data)
  56 {
  57         struct mwifiex_private *priv = (struct mwifiex_private *)data;
  58         struct mwifiex_adapter *adapter = priv->adapter;
  59         struct cmd_ctrl_node *cmd_node, *tmp_node;
  60         unsigned long flags;
  61
  62         if (adapter->surprise_removed)
  63                 return;
  64
  65         if (adapter->scan_delay_cnt == MWIFIEX_MAX_SCAN_DELAY_CNT) {
  66                 /*
  67                  * Abort scan operation by cancelling all pending scan
  68                  * commands
  69                  */
  70                 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
  71                 list_for_each_entry_safe(cmd_node, tmp_node,
  72                                          &adapter->scan_pending_q, list) {
  73                         list_del(&cmd_node->list);
  74                         mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
  75                 }
  76                 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
  77
  78                 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
  79                 adapter->scan_processing = false;
  80                 adapter->scan_delay_cnt = 0;
  81                 adapter->empty_tx_q_cnt = 0;
  82                 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
  83
  84                 if (priv->scan_request) {
  85                         dev_dbg(adapter->dev, "info: aborting scan\n");
  86                         cfg80211_scan_done(priv->scan_request, 1);
  87                         priv->scan_request = NULL;
  88                 } else {
  89                         priv->scan_aborting = false;
  90                         dev_dbg(adapter->dev, "info: scan already aborted\n");
  91                 }
  92                 goto done;
  93         }
  94
  95         if (!atomic_read(&priv->adapter->is_tx_received)) {
  96                 adapter->empty_tx_q_cnt++;
  97                 if (adapter->empty_tx_q_cnt == MWIFIEX_MAX_EMPTY_TX_Q_CNT) {
  98                         /*
  99                          * No Tx traffic for 200msec. Get scan command from
 100                          * scan pending queue and put to cmd pending queue to
 101                          * resume scan operation
 102                          */
 103                         adapter->scan_delay_cnt = 0;
 104                         adapter->empty_tx_q_cnt = 0;
 105                         spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
 106                         cmd_node = list_first_entry(&adapter->scan_pending_q,
 107                                                     struct cmd_ctrl_node, list);
 108                         list_del(&cmd_node->list);
 109                         spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
 110                                                flags);
 111
 112                         mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
 113                                                         true);
 114                         queue_work(adapter->workqueue, &adapter->main_work);
 115                         goto done;
 116                 }
 117         } else {
 118                 adapter->empty_tx_q_cnt = 0;
 119         }
 120
 121         /* Delay scan operation further by 20msec */
 122         mod_timer(&priv->scan_delay_timer, jiffies +
 123                   msecs_to_jiffies(MWIFIEX_SCAN_DELAY_MSEC));
 124         adapter->scan_delay_cnt++;
 125
 126 done:
 127         if (atomic_read(&priv->adapter->is_tx_received))
 128                 atomic_set(&priv->adapter->is_tx_received, false);
 129
 130         return;
 131 }
 132
 133 /*
 134  * This function initializes the private structure and sets default
 135  * values to the members.
 136  *
 137  * Additionally, it also initializes all the locks and sets up all the
 138  * lists.
 139  */
 140 int mwifiex_init_priv(struct mwifiex_private *priv)
 141 {
 142         u32 i;
 143
 144         priv->media_connected = false;
 145         memset(priv->curr_addr, 0xff, ETH_ALEN);
 146
 147         priv->pkt_tx_ctrl = 0;
 148         priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
 149         priv->data_rate = 0;    /* Initially indicate the rate as auto */
 150         priv->is_data_rate_auto = true;
 151         priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
 152         priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
 153
 154         priv->sec_info.wep_enabled = 0;
 155         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
 156         priv->sec_info.encryption_mode = 0;
 157         for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
 158                 memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
 159         priv->wep_key_curr_index = 0;
 160         priv->curr_pkt_filter = HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
 161                                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
 162
 163         priv->beacon_period = 100; /* beacon interval */ ;
 164         priv->attempted_bss_desc = NULL;
 165         memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
 166         priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
 167
 168         memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
 169         memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
 170         memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
 171         priv->assoc_rsp_size = 0;
 172         priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
 173         priv->atim_window = 0;
 174         priv->adhoc_state = ADHOC_IDLE;
 175         priv->tx_power_level = 0;
 176         priv->max_tx_power_level = 0;
 177         priv->min_tx_power_level = 0;
 178         priv->tx_rate = 0;
 179         priv->rxpd_htinfo = 0;
 180         priv->rxpd_rate = 0;
 181         priv->rate_bitmap = 0;
 182         priv->data_rssi_last = 0;
 183         priv->data_rssi_avg = 0;
 184         priv->data_nf_avg = 0;
 185         priv->data_nf_last = 0;
 186         priv->bcn_rssi_last = 0;
 187         priv->bcn_rssi_avg = 0;
 188         priv->bcn_nf_avg = 0;
 189         priv->bcn_nf_last = 0;
 190         memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
 191         memset(&priv->aes_key, 0, sizeof(priv->aes_key));
 192         priv->wpa_ie_len = 0;
 193         priv->wpa_is_gtk_set = false;
 194
 195         memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
 196         priv->assoc_tlv_buf_len = 0;
 197         memset(&priv->wps, 0, sizeof(priv->wps));
 198         memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
 199         priv->gen_ie_buf_len = 0;
 200         memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
 201
 202         priv->wmm_required = true;
 203         priv->wmm_enabled = false;
 204         priv->wmm_qosinfo = 0;
 205         priv->curr_bcn_buf = NULL;
 206         priv->curr_bcn_size = 0;
 207         priv->wps_ie = NULL;
 208         priv->wps_ie_len = 0;
 209         priv->ap_11n_enabled = 0;
 210         memset(&priv->roc_cfg, 0, sizeof(priv->roc_cfg));
 211
 212         priv->scan_block = false;
 213
 214         setup_timer(&priv->scan_delay_timer, scan_delay_timer_fn,
 215                     (unsigned long)priv);
 216
 217         return mwifiex_add_bss_prio_tbl(priv);
 218 }
 219
 220 /*
 221  * This function allocates buffers for members of the adapter
 222  * structure.
 223  *
 224  * The memory allocated includes scan table, command buffers, and
 225  * sleep confirm command buffer. In addition, the queues are
 226  * also initialized.
 227  */
 228 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
 229 {
 230         int ret;
 231
 232         /* Allocate command buffer */
 233         ret = mwifiex_alloc_cmd_buffer(adapter);
 234         if (ret) {
 235                 dev_err(adapter->dev, "%s: failed to alloc cmd buffer\n",
 236                         __func__);
 237                 return -1;
 238         }
 239
 240         adapter->sleep_cfm =
 241                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 242                               + INTF_HEADER_LEN);
 243
 244         if (!adapter->sleep_cfm) {
 245                 dev_err(adapter->dev, "%s: failed to alloc sleep cfm"
 246                         " cmd buffer\n", __func__);
 247                 return -1;
 248         }
 249         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
 250
 251         return 0;
 252 }
 253
 254 /*
 255  * This function initializes the adapter structure and sets default
 256  * values to the members of adapter.
 257  *
 258  * This also initializes the WMM related parameters in the driver private
 259  * structures.
 260  */
 261 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 262 {
 263         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;
 264
 265         skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
 266
 267         adapter->cmd_sent = false;
 268
 269         if (adapter->iface_type == MWIFIEX_SDIO)
 270                 adapter->data_sent = true;
 271         else
 272                 adapter->data_sent = false;
 273
 274         adapter->cmd_resp_received = false;
 275         adapter->event_received = false;
 276         adapter->data_received = false;
 277
 278         adapter->surprise_removed = false;
 279
 280         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 281
 282         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 283         adapter->ps_state = PS_STATE_AWAKE;
 284         adapter->need_to_wakeup = false;
 285
 286         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 287         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 288         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 289         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
 290
 291         adapter->scan_probes = 1;
 292
 293         adapter->multiple_dtim = 1;
 294
 295         adapter->local_listen_interval = 0;     /* default value in firmware
 296                                                    will be used */
 297
 298         adapter->is_deep_sleep = false;
 299
 300         adapter->delay_null_pkt = false;
 301         adapter->delay_to_ps = 1000;
 302         adapter->enhanced_ps_mode = PS_MODE_AUTO;
 303
 304         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
 305                                            default */
 306         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 307                                            default */
 308         adapter->pm_wakeup_card_req = false;
 309
 310         adapter->pm_wakeup_fw_try = false;
 311
 312         adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 313         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 314
 315         adapter->is_hs_configured = false;
 316         adapter->hs_cfg.conditions = cpu_to_le32(HS_CFG_COND_DEF);
 317         adapter->hs_cfg.gpio = HS_CFG_GPIO_DEF;
 318         adapter->hs_cfg.gap = HS_CFG_GAP_DEF;
 319         adapter->hs_activated = false;
 320
 321         memset(adapter->event_body, 0, sizeof(adapter->event_body));
 322         adapter->hw_dot_11n_dev_cap = 0;
 323         adapter->hw_dev_mcs_support = 0;
 324         adapter->sec_chan_offset = 0;
 325         adapter->adhoc_11n_enabled = false;
 326
 327         mwifiex_wmm_init(adapter);
 328
 329         if (adapter->sleep_cfm) {
 330                 sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
 331                                                 adapter->sleep_cfm->data;
 332                 memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
 333                 sleep_cfm_buf->command =
 334                                 cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 335                 sleep_cfm_buf->size =
 336                                 cpu_to_le16(adapter->sleep_cfm->len);
 337                 sleep_cfm_buf->result = 0;
 338                 sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
 339                 sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
 340         }
 341         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 342         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 343         adapter->tx_lock_flag = false;
 344         adapter->null_pkt_interval = 0;
 345         adapter->fw_bands = 0;
 346         adapter->config_bands = 0;
 347         adapter->adhoc_start_band = 0;
 348         adapter->scan_channels = NULL;
 349         adapter->fw_release_number = 0;
 350         adapter->fw_cap_info = 0;
 351         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 352         adapter->event_cause = 0;
 353         adapter->region_code = 0;
 354         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 355         adapter->adhoc_awake_period = 0;
 356         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 357         adapter->arp_filter_size = 0;
 358         adapter->max_mgmt_ie_index = MAX_MGMT_IE_INDEX;
 359         adapter->empty_tx_q_cnt = 0;
 360 }
 361
 362 /*
 363  * This function sets trans_start per tx_queue
 364  */
 365 void mwifiex_set_trans_start(struct net_device *dev)
 366 {
 367         int i;
 368
 369         for (i = 0; i < dev->num_tx_queues; i++)
 370                 netdev_get_tx_queue(dev, i)->trans_start = jiffies;
 371
 372         dev->trans_start = jiffies;
 373 }
 374
 375 /*
 376  * This function wakes up all queues in net_device
 377  */
 378 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
 379                                         struct mwifiex_adapter *adapter)
 380 {
 381         unsigned long dev_queue_flags;
 382         unsigned int i;
 383
 384         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 385
 386         for (i = 0; i < netdev->num_tx_queues; i++) {
 387                 struct netdev_queue *txq = netdev_get_tx_queue(netdev, i);
 388
 389                 if (netif_tx_queue_stopped(txq))
 390                         netif_tx_wake_queue(txq);
 391         }
 392
 393         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 394 }
 395
 396 /*
 397  * This function stops all queues in net_device
 398  */
 399 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
 400                                         struct mwifiex_adapter *adapter)
 401 {
 402         unsigned long dev_queue_flags;
 403         unsigned int i;
 404
 405         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 406
 407         for (i = 0; i < netdev->num_tx_queues; i++) {
 408                 struct netdev_queue *txq = netdev_get_tx_queue(netdev, i);
 409
 410                 if (!netif_tx_queue_stopped(txq))
 411                         netif_tx_stop_queue(txq);
 412         }
 413
 414         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 415 }
 416
 417 /*
 418  *  This function releases the lock variables and frees the locks and
 419  *  associated locks.
 420  */
 421 static void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
 422 {
 423         struct mwifiex_private *priv;
 424         s32 i, j;
 425
 426         /* Free lists */
 427         list_del(&adapter->cmd_free_q);
 428         list_del(&adapter->cmd_pending_q);
 429         list_del(&adapter->scan_pending_q);
 430
 431         for (i = 0; i < adapter->priv_num; i++)
 432                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
 433
 434         for (i = 0; i < adapter->priv_num; i++) {
 435                 if (adapter->priv[i]) {
 436                         priv = adapter->priv[i];
 437                         for (j = 0; j < MAX_NUM_TID; ++j)
 438                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 439                         list_del(&priv->tx_ba_stream_tbl_ptr);
 440                         list_del(&priv->rx_reorder_tbl_ptr);
 441                         list_del(&priv->sta_list);
 442                 }
 443         }
 444 }
 445
 446 /*
 447  * This function performs cleanup for adapter structure.
 448  *
 449  * The cleanup is done recursively, by canceling all pending
 450  * commands, freeing the member buffers previously allocated
 451  * (command buffers, scan table buffer, sleep confirm command
 452  * buffer), stopping the timers and calling the cleanup routines
 453  * for every interface.
 454  */
 455 static void
 456 mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter)
 457 {
 458         int i;
 459
 460         if (!adapter) {
 461                 pr_err("%s: adapter is NULL\n", __func__);
 462                 return;
 463         }
 464
 465         for (i = 0; i < adapter->priv_num; i++) {
 466                 if (adapter->priv[i])
 467                         del_timer_sync(&adapter->priv[i]->scan_delay_timer);
 468         }
 469
 470         mwifiex_cancel_all_pending_cmd(adapter);
 471
 472         /* Free lock variables */
 473         mwifiex_free_lock_list(adapter);
 474
 475         /* Free command buffer */
 476         dev_dbg(adapter->dev, "info: free cmd buffer\n");
 477         mwifiex_free_cmd_buffer(adapter);
 478
 479         del_timer(&adapter->cmd_timer);
 480
 481         dev_dbg(adapter->dev, "info: free scan table\n");
 482
 483         if (adapter->if_ops.cleanup_if)
 484                 adapter->if_ops.cleanup_if(adapter);
 485
 486         if (adapter->sleep_cfm)
 487                 dev_kfree_skb_any(adapter->sleep_cfm);
 488 }
 489
 490 /*
 491  *  This function intializes the lock variables and
 492  *  the list heads.
 493  */
 494 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 495 {
 496         struct mwifiex_private *priv;
 497         s32 i, j;
 498
 499         spin_lock_init(&adapter->mwifiex_lock);
 500         spin_lock_init(&adapter->int_lock);
 501         spin_lock_init(&adapter->main_proc_lock);
 502         spin_lock_init(&adapter->mwifiex_cmd_lock);
 503         spin_lock_init(&adapter->queue_lock);
 504         for (i = 0; i < adapter->priv_num; i++) {
 505                 if (adapter->priv[i]) {
 506                         priv = adapter->priv[i];
 507                         spin_lock_init(&priv->rx_pkt_lock);
 508                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 509                         spin_lock_init(&priv->curr_bcn_buf_lock);
 510                         spin_lock_init(&priv->sta_list_spinlock);
 511                 }
 512         }
 513
 514         /* Initialize cmd_free_q */
 515         INIT_LIST_HEAD(&adapter->cmd_free_q);
 516         /* Initialize cmd_pending_q */
 517         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 518         /* Initialize scan_pending_q */
 519         INIT_LIST_HEAD(&adapter->scan_pending_q);
 520
 521         spin_lock_init(&adapter->cmd_free_q_lock);
 522         spin_lock_init(&adapter->cmd_pending_q_lock);
 523         spin_lock_init(&adapter->scan_pending_q_lock);
 524
 525         skb_queue_head_init(&adapter->usb_rx_data_q);
 526
 527         for (i = 0; i < adapter->priv_num; ++i) {
 528                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 529                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 530         }
 531
 532         for (i = 0; i < adapter->priv_num; i++) {
 533                 if (!adapter->priv[i])
 534                         continue;
 535                 priv = adapter->priv[i];
 536                 for (j = 0; j < MAX_NUM_TID; ++j)
 537                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 538                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 539                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 540                 INIT_LIST_HEAD(&priv->sta_list);
 541
 542                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 543                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 544         }
 545
 546         return 0;
 547 }
 548
 549 /*
 550  * This function initializes the firmware.
 551  *
 552  * The following operations are performed sequentially -
 553  *      - Allocate adapter structure
 554  *      - Initialize the adapter structure
 555  *      - Initialize the private structure
 556  *      - Add BSS priority tables to the adapter structure
 557  *      - For each interface, send the init commands to firmware
 558  *      - Send the first command in command pending queue, if available
 559  */
 560 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 561 {
 562         int ret;
 563         struct mwifiex_private *priv;
 564         u8 i, first_sta = true;
 565         int is_cmd_pend_q_empty;
 566         unsigned long flags;
 567
 568         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 569
 570         /* Allocate memory for member of adapter structure */
 571         ret = mwifiex_allocate_adapter(adapter);
 572         if (ret)
 573                 return -1;
 574
 575         /* Initialize adapter structure */
 576         mwifiex_init_adapter(adapter);
 577
 578         for (i = 0; i < adapter->priv_num; i++) {
 579                 if (adapter->priv[i]) {
 580                         priv = adapter->priv[i];
 581
 582                         /* Initialize private structure */
 583                         ret = mwifiex_init_priv(priv);
 584                         if (ret)
 585                                 return -1;
 586                 }
 587         }
 588
 589         if (adapter->if_ops.init_fw_port) {
 590                 if (adapter->if_ops.init_fw_port(adapter))
 591                         return -1;
 592         }
 593
 594         for (i = 0; i < adapter->priv_num; i++) {
 595                 if (adapter->priv[i]) {
 596                         ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta);
 597                         if (ret == -1)
 598                                 return -1;
 599
 600                         first_sta = false;
 601                 }
 602         }
 603
 604         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 605         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 606         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 607         if (!is_cmd_pend_q_empty) {
 608                 /* Send the first command in queue and return */
 609                 if (mwifiex_main_process(adapter) != -1)
 610                         ret = -EINPROGRESS;
 611         } else {
 612                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 613         }
 614
 615         return ret;
 616 }
 617
 618 /*
 619  * This function deletes the BSS priority tables.
 620  *
 621  * The function traverses through all the allocated BSS priority nodes
 622  * in every BSS priority table and frees them.
 623  */
 624 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 625 {
 626         int i;
 627         struct mwifiex_adapter *adapter = priv->adapter;
 628         struct mwifiex_bss_prio_node *bssprio_node, *tmp_node;
 629         struct list_head *head;
 630         spinlock_t *lock; /* bss priority lock */
 631         unsigned long flags;
 632
 633         for (i = 0; i < adapter->priv_num; ++i) {
 634                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 635                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 636                 dev_dbg(adapter->dev, "info: delete BSS priority table,"
 637                                 " bss_type = %d, bss_num = %d, i = %d,"
 638                                 " head = %p\n",
 639                               priv->bss_type, priv->bss_num, i, head);
 640
 641                 {
 642                         spin_lock_irqsave(lock, flags);
 643                         if (list_empty(head)) {
 644                                 spin_unlock_irqrestore(lock, flags);
 645                                 continue;
 646                         }
 647                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
 648                                                  list) {
 649                                 if (bssprio_node->priv == priv) {
 650                                         dev_dbg(adapter->dev, "info: Delete "
 651                                                 "node %p, next = %p\n",
 652                                                 bssprio_node, tmp_node);
 653                                         list_del(&bssprio_node->list);
 654                                         kfree(bssprio_node);
 655                                 }
 656                         }
 657                         spin_unlock_irqrestore(lock, flags);
 658                 }
 659         }
 660 }
 661
 662 /*
 663  * This function frees the private structure, including cleans
 664  * up the TX and RX queues and frees the BSS priority tables.
 665  */
 666 void mwifiex_free_priv(struct mwifiex_private *priv)
 667 {
 668         mwifiex_clean_txrx(priv);
 669         mwifiex_delete_bss_prio_tbl(priv);
 670         mwifiex_free_curr_bcn(priv);
 671 }
 672
 673 /*
 674  * This function is used to shutdown the driver.
 675  *
 676  * The following operations are performed sequentially -
 677  *      - Check if already shut down
 678  *      - Make sure the main process has stopped
 679  *      - Clean up the Tx and Rx queues
 680  *      - Delete BSS priority tables
 681  *      - Free the adapter
 682  *      - Notify completion
 683  */
 684 int
 685 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 686 {
 687         int ret = -EINPROGRESS;
 688         struct mwifiex_private *priv;
 689         s32 i;
 690         struct sk_buff *skb;
 691
 692         /* mwifiex already shutdown */
 693         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 694                 return 0;
 695
 696         adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
 697         /* wait for mwifiex_process to complete */
 698         if (adapter->mwifiex_processing) {
 699                 dev_warn(adapter->dev, "main process is still running\n");
 700                 return ret;
 701         }
 702
 703         /* cancel current command */
 704         if (adapter->curr_cmd) {
 705                 dev_warn(adapter->dev, "curr_cmd is still in processing\n");
 706                 del_timer(&adapter->cmd_timer);
 707                 mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
 708                 adapter->curr_cmd = NULL;
 709         }
 710
 711         /* shut down mwifiex */
 712         dev_dbg(adapter->dev, "info: shutdown mwifiex...\n");
 713
 714         /* Clean up Tx/Rx queues and delete BSS priority table */
 715         for (i = 0; i < adapter->priv_num; i++) {
 716                 if (adapter->priv[i]) {
 717                         priv = adapter->priv[i];
 718
 719                         mwifiex_clean_txrx(priv);
 720                         mwifiex_delete_bss_prio_tbl(priv);
 721                 }
 722         }
 723
 724         spin_lock(&adapter->mwifiex_lock);
 725
 726         if (adapter->if_ops.data_complete) {
 727                 while ((skb = skb_dequeue(&adapter->usb_rx_data_q))) {
 728                         struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
 729
 730                         priv = adapter->priv[rx_info->bss_num];
 731                         if (priv)
 732                                 priv->stats.rx_dropped++;
 733
 734                         adapter->if_ops.data_complete(adapter, skb);
 735                 }
 736         }
 737
 738         mwifiex_adapter_cleanup(adapter);
 739
 740         spin_unlock(&adapter->mwifiex_lock);
 741
 742         /* Notify completion */
 743         ret = mwifiex_shutdown_fw_complete(adapter);
 744
 745         return ret;
 746 }
 747
 748 /*
 749  * This function downloads the firmware to the card.
 750  *
 751  * The actual download is preceded by two sanity checks -
 752  *      - Check if firmware is already running
 753  *      - Check if the interface is the winner to download the firmware
 754  *
 755  * ...and followed by another -
 756  *      - Check if the firmware is downloaded successfully
 757  *
 758  * After download is successfully completed, the host interrupts are enabled.
 759  */
 760 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 761                     struct mwifiex_fw_image *pmfw)
 762 {
 763         int ret;
 764         u32 poll_num = 1;
 765
 766         if (adapter->if_ops.check_fw_status) {
 767                 adapter->winner = 0;
 768
 769                 /* check if firmware is already running */
 770                 ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 771                 if (!ret) {
 772                         dev_notice(adapter->dev,
 773                                    "WLAN FW already running! Skip FW dnld\n");
 774                         goto done;
 775                 }
 776
 777                 poll_num = MAX_FIRMWARE_POLL_TRIES;
 778
 779                 /* check if we are the winner for downloading FW */
 780                 if (!adapter->winner) {
 781                         dev_notice(adapter->dev,
 782                                    "FW already running! Skip FW dnld\n");
 783                         poll_num = MAX_MULTI_INTERFACE_POLL_TRIES;
 784                         goto poll_fw;
 785                 }
 786         }
 787
 788         if (pmfw) {
 789                 /* Download firmware with helper */
 790                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 791                 if (ret) {
 792                         dev_err(adapter->dev, "prog_fw failed ret=%#x\n", ret);
 793                         return ret;
 794                 }
 795         }
 796
 797 poll_fw:
 798         /* Check if the firmware is downloaded successfully or not */
 799         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 800         if (ret) {
 801                 dev_err(adapter->dev, "FW failed to be active in time\n");
 802                 return -1;
 803         }
 804 done:
 805         /* re-enable host interrupt for mwifiex after fw dnld is successful */
 806         if (adapter->if_ops.enable_int)
 807                 adapter->if_ops.enable_int(adapter);
 808
 809         return ret;
 810 }